filtro de espuma cer\u00e2mica<\/a> Devido \u00e0 sua estrutura complexa, a separa\u00e7\u00e3o mec\u00e2nica ret\u00e9m as inclus\u00f5es maiores do que os poros da superf\u00edcie do filtro e as deposita na extremidade de entrada do metal l\u00edquido do filtro, tornando-as parte integrante do pr\u00f3prio filtro. \u00c0 medida que o ac\u00famulo de inclus\u00f5es na superf\u00edcie do filtro aumenta, forma-se gradualmente uma camada de \u201cbolo de filtra\u00e7\u00e3o\u201d, o que estreita ainda mais o canal de fluxo do metal fundido. Portanto, a superf\u00edcie do novo meio filtrante \u00e9 capaz de reter inclus\u00f5es mais finas. Ao mesmo tempo, o interior do meio tamb\u00e9m exerce um efeito de filtragem, e alguns dos muitos pequenos orif\u00edcios que penetram no corpo cer\u00e2mico apresentam min\u00fasculas fendas, enquanto outros possuem cantos mortos. Essas \u00e1reas com diferentes caracter\u00edsticas s\u00e3o locais potenciais para a intercepta\u00e7\u00e3o de inclus\u00f5es, e h\u00e1 tamb\u00e9m um efeito de \u201cbolo de filtra\u00e7\u00e3o\u201d no interior do filtro.<\/p>\n![\"\"](\"http:\/\/alalloycasting.com\/wp-content\/uploads\/2021\/08\/Molten-Alu-Purification-Treatment.jpg\")
<\/p>\n
Efeito de superf\u00edcie: Quando o metal fundido flui atrav\u00e9s do corpo cer\u00e2mico com estrutura complexa, ele se divide em muitas pequenas correntes, o que aumenta a \u00e1rea de contato e a probabilidade de contato entre as part\u00edculas centrais do metal fundido e o meio filtrante. Como a superf\u00edcie do filtro \u00e9 composta por pequenas sali\u00eancias e recesses, o tamanho dos recessos \u00e9 de cerca de 1 a 10 \u00b5m, o que proporciona um efeito de adsor\u00e7\u00e3o eletrost\u00e1tica e ades\u00e3o para interceptar as inclus\u00f5es.<\/p>\n
Efeito de retifica\u00e7\u00e3o: Quando o metal fundido flui atrav\u00e9s do filtro de espuma cer\u00e2mica, ele se divide em correntes compostas por muitas pequenas unidades, fazendo com que o fluxo do l\u00edquido tenda a se mover de forma laminar. Quando o metal fundido se encontra em um estado de fluxo laminar, como sua densidade \u00e9 muito maior do que a densidade das inclus\u00f5es, estas t\u00eam tempo suficiente para flutuar e serem removidas.<\/p>","protected":false},"excerpt":{"rendered":"
Foam ceramic filters for metal casting have been widely used in aluminum foundry because of their good economic benefits and strong impurity removal function. The…<\/p>","protected":false},"author":1,"featured_media":9888,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[233],"tags":[12356,1729,12355],"class_list":["post-9887","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog","tag-filter-for-metal-casting","tag-foam-ceramic-filters","tag-metal-filtration-mechanism"],"yoast_head":"\n
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